Transformer.



C` LE G. FORTESCUE.

TBANSFORMER.

APPLICATION FILED JULYe, 1908.

Patented July .4, 1911.

3 SHEETS-SHEET l.

WETNESSES 6 -m G. LB Gl PORTESGUE.

TRANSFORMER.

APPLICATION FILED JULs, 1908.

Patented July 4, 19H.

3 SHEETS-SHEET R lNVENTOR I WHNESSES; @M/

ATTRNEY x easing lining Shown in section.

STATES PATENT 'QFFCE CHARLES LE G. FORTES/CUE, OF NILKINSB'URG PENNSYLVNA, SSIGNOR, BY M SNE IC i .li/[ANUACTURING COMPANY, .OF

TRANSFORNER.

Specification of Letters Patent.

Application filed July '5, 1938.

Serial No. 442,199.

To all wlw/m ic', may concern:

lle it. known that l, Cnrxnnns l 'rnSttii-z, a Subject ot" the Qing of A e ain, ancl a reniilent, ot llilliinsl urg, in the County7 of .llle, 'henyY and Siate ot llennsyh Vania, have invented a ne f' and usetul l1uproveinent in l`ransitoriner5, ot' which the following a specitlcntion.

y invention relatef l to electrical transfornlers antl particularly to nieans Vfor supportino', insulating and interconnectingI the internal terminal leach,4 oli' transformers ot large et punit' and high potential.

The object ot my intention is'to provitle a simple antl etlective niean;I tor no Sup* porting` and inSulatinf.;l the, internal ternii nal leal-ls ot high potential tiaii'isforiners as to preclude the pos'ihilitj,7 ot mechanical interference and consequent production ot Short circuits. and nlso to ell'ectitelv Support :intl inxulate the conductors utilized for intercoiniecting the high tension Colla eorresponding to ililterent phases, in case, the invention is applied to polyphone transforrners.

In the accompanyiire, drawings, Figure l isy a` view in Fille elevation ol a portion oll a tranSt'mmer embodying' my invention, the ,Finn Q is n plan view ot a portion ot the trztnstoriner partially illustrated in Fig. l, theI cover ot the canine` hei'ngr reinovetl. Fig. f5 t detail n (l. Fon-- r Sifleelevation of a portion ot one set or primary coils, a terminal therefor ainl a ternunal bridge .vlneh Supports and iunulates the Sarno My invention, aS illustrated in the (lr-awingrs, is applied to a three-phase high potential transtoriner l which 1S loeatetl in n receptacle. 2 containing Sutlieient oil to sub,

merge the tranSforiner (tores anfleoils. rlhe transformer section tor each phase eoinprises two sets of high tension coil@i antl three sets of low tension coils et, thc :overal sets being Separated troni nach other oy insulating barriers 5, and atljneent trans- 1t liritnectetl and intereoinmcted by nrcan-S ot flexihle comluctors1 t4 the entlS ot' which are clamped to terminal lilocks or pmtes Shtlle latter being ySupptn'tetl upon a suitably in- Sulatetl and approximately horizontal liar l0. the ends ol: which are attached to Stan lardul ll in suoli nianner as to he vertieally atljuntahle thereon. The 'connection ot the low tension terminal blocks or plates t) to the cireuit external to the' transformer is ruafle hy ineann ot Suitnhly inSulated rods or wires lil which project out from the cover of the caninel antl are. insulated therefrom by' Suitable insulating huShings lai- The, high ttinsion coils 3 of each group are connected by ineann of flexible insulated leatl 'wireS 15 to the, ends of a metal clip 16, and this clip is fastened to the inner end ot a vertical conclueting rod 17 hy means` ot' nuts 1S. the roilfi heine' mounted in an insu-u latin;` tuluilar bushing 19 xnatle of pornela-in or other suitable non-conducting nmterial. The hushir vs for each group of high tension collo are Supported hy a britlffevQO of inverted til-shape anll composed ot a plurality of superposed sheets or plates ot innulating` material. The hriilg'e comprises two outer angular plates,l 2l antl Q2, tne vertical portions ot which project, reSpecti'Vely, between plates 9? autl 2l/Vl ot one side barrier and the platesl 25 :intl QG ot the other Siilo barrier, a iniehlle plane pluto 27 and two inner annular plateal 2S an l 2), the vertical portions of which project, respectively, between plates Zt and 3l) of ont; side harrier and plates 26 and 31 ot' tho other sitle barrier. The interleuvetl portions of plates 2l, 28, 23, 24, and il() may he lastened together hy pins 32 or otherwise anxl the Corresponding portions ot plates QQ, S29, 26, antl 3l may he 'fast'enefl together hy similar means Z533. The top portions oi 'the bridge plates` may he taste-,neel together by rivets B-lantl may he suitably eut awavto receive the bushing' 19 nl'its lango B5. The Serew-tlnnzule l up-` per enti ol' the holty l? pertaining,r to each ral-@med July 4, 15H1.'

sired terminal bolts by means of the thumbnuts.

Connections between the high tension coils 3 and the external circuit are made by means of insulated wires 38 which project through the cover 13 and are insulated therefrom by bushings 39, the inner ends 40 of which are bent to the desired angle and connected by means of suitable clips itl and the proper thumb-nuts 3G to the corresponding` terminal bolts 17, the inner angular portions t0 of the wires being provided with insulating sleeves, as indicated.

lt can bc seen from the foregoing description, in connection with the illustration, that the terminal bridges Q0 are so constructed and mounted in position, independently of the transfori'ner casing, as to thoroughly insulate the terminals which they support from each other, and that they also afford rigid supports for the terminal bolts and bushings so that no mechanical or electrical strains can produce any displacement ofthe parts to cause short circuits or other disturbances.

My invent-ion may, of course, be applied to a single-phase transformer or to a transformer having a` `greater or a less number of high tension terminal leads than I .have here shown, and the specific details shown and described are, of course, susceptible of further variations within considerable limits, Without departing from the spirit and scope of my invention.

l claim as my invention:

l. transformer comprising a plurality of coils, insulating barriers between the coils and terminal-supporting bridges extending between the barriers.

2. A transformer comprising,v a plurality of coils, insulating;v barriers bei ween the coils, bridges'extending between the barriers and inter-locked therewith, and terminal devices `supported by the bridges.

3. An electrical transformer having its high tension and low tension coils separated by multiple insulating' barriers and terminal-supporting bridges composed of overlapping plates the ends of which are interleaved with the barrier plates.

l. An electrical transformer having its high tension and low tension windings separated by laminated insulating barriers and laminated terminal bridges having` their ends projecting between the barrier laminze.

5. An electrical transformer having insulatine` barriers between its high and low tension coils and a terminal bridge of inverted U-shape attached to and supported by the barriers.

ln testimony whereof, subscribed my name this 1908.

CHARLES LE G. FORTESCUE.

W'itnesses U. M. MoCoNAnnr Binner I-liivns.

l have hereunto th day of June, 

